The placement of one's face, specifically the mouth, into the area between a well-endowed woman's breasts, followed by a rapid shaking of the face in a side-to-side motion accompanied by yelling. The resulting sound that is created sounds similar to an outboard boat motor.
by BMan01 November 25, 2005
We thought Michael was getting lucky in his room, but it turned out he was just motorboating by himself.
by BobbyHi11 December 10, 2014
by Kawaii Koneko Ichigo April 07, 2009
When a man grabs his penis and sticks it through the crack between a woman's boobs as if he were doing the real thing.
by omgtits July 17, 2009
It means the activity of putting one's face between a woman's breasts, and rocking turning one's head rapidly from side to side while making a noise like a motorboat.
"Put your head between her tits and go bbl bbl bbl bbl bbl..."
"Put your head between her tits and go bbl bbl bbl bbl bbl..."
by corgilover18 November 14, 2018
by Urban Dictionary October 26, 2007
"This girl was in my room and I couldn't take it anymore so I motorboated her. After the motorboating she left."
by A Bobby August 28, 2006